checkCount {checkmate}

Check if an argument is a count

Description

A count is defined as non-negative integerish value.

Usage

checkCount(
  x,
  na.ok = FALSE,
  positive = FALSE,
  tol = sqrt(.Machine$double.eps),
  null.ok = FALSE
)

check_count(
  x,
  na.ok = FALSE,
  positive = FALSE,
  tol = sqrt(.Machine$double.eps),
  null.ok = FALSE
)

assertCount(
  x,
  na.ok = FALSE,
  positive = FALSE,
  tol = sqrt(.Machine$double.eps),
  null.ok = FALSE,
  coerce = FALSE,
  .var.name = vname(x),
  add = NULL
)

assert_count(
  x,
  na.ok = FALSE,
  positive = FALSE,
  tol = sqrt(.Machine$double.eps),
  null.ok = FALSE,
  coerce = FALSE,
  .var.name = vname(x),
  add = NULL
)

testCount(
  x,
  na.ok = FALSE,
  positive = FALSE,
  tol = sqrt(.Machine$double.eps),
  null.ok = FALSE
)

test_count(
  x,
  na.ok = FALSE,
  positive = FALSE,
  tol = sqrt(.Machine$double.eps),
  null.ok = FALSE
)

expect_count(
  x,
  na.ok = FALSE,
  positive = FALSE,
  tol = sqrt(.Machine$double.eps),
  null.ok = FALSE,
  info = NULL,
  label = vname(x)
)

Arguments

x

[any]
Object to check.

na.ok

[logical(1)]
Are missing values allowed? Default is FALSE.

positive

[logical(1)]
Must x be positive (>= 1)? Default is FALSE, allowing 0.

tol

[double(1)]
Numerical tolerance used to check whether a double or complex can be converted. Default is sqrt(.Machine$double.eps).

null.ok

[logical(1)]
If set to TRUE, x may also be NULL. In this case only a type check of x is performed, all additional checks are disabled.

coerce

[logical(1)]
If TRUE, the input x is returned as integer after an successful assertion.

.var.name

[character(1)]
Name of the checked object to print in assertions. Defaults to the heuristic implemented in vname.

add

[AssertCollection]
Collection to store assertion messages. See AssertCollection.

info

[character(1)]
Extra information to be included in the message for the testthat reporter. See expect_that.

label

[character(1)]
Name of the checked object to print in messages. Defaults to the heuristic implemented in vname.

Details

This function does not distinguish between NA, NA_integer_, NA_real_, NA_complex_ NA_character_ and NaN.

Value

Depending on the function prefix: If the check is successful, the functions assertCount/assert_count return x invisibly, whereas checkCount/check_count and testCount/test_count return TRUE. If the check is not successful, assertCount/assert_count throws an error message, testCount/test_count returns FALSE, and checkCount/check_count return a string with the error message. The function expect_count always returns an expectation.

Note

To perform an assertion and then convert to integer, use asCount. assertCount will not convert numerics to integer.

See Also

Other scalars: checkFlag(), checkInt(), checkNumber(), checkScalar(), checkScalarNA(), checkString()

Examples

testCount(1)
testCount(-1)